Ferrari Mailing List: Re: Cleaning femal ends of relays procedures and spark plugs

[Matt (fer308qv]

You may want to check for a vacuum leak . On my 1985 308qv I developed a miss and occasional backfire shortly after my major service. It ended up being a bolt /stud fell out that held a clip which supports the fuel lines for the forward cylinder bank. It's located on the passenger side of the airbox. Apparently it is threaded all the through causing the massive leak . (would love a close-up picture from anybody with the same car. I can't find the part in the parts book.)

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On Aug 25, 2014, at 6:54 PM, Michel Savard <mysavard [at] videotron.ca> wrote:

 

O.k. I followed someone's advice and bought the aerosol can to clean the female ends of the relays. The clerk told me to unplug the negative on the battery and shoot the spray inside the slots (female ends) of the relays. Wait 15-20 minutes and put eveything back together. Anything else I need to know ?

I also got a new relay. Didn't want to take any chance.

 

Also, I decided to switch from NGK BPR7ES to BPR5ES. This could/should fix my constant backfires (small ones) I had when I was stuck in traffic in 2nd and 3rd gear at around 3,000 rpm when the engine was very hot and temperature was hot and humid. This problem has been going on for 3 summers now. Plug wires were changed, connectors, injectors, gasket job was done last year, etc. This problem started as I stated 3 years ago when I put BOSCH spark plugs in. The clerk didn't have what I wanted and he said 'my computer says those BOSCH plugs are the equivalent of what you usually put in'.

A week later HORRENDOUS backfires going on for about 2 miles while driving back home. Changed back to NGK (#7) but small backfires have been constant ever since.

A mechanic (he has the same Ferrari as mine) told me that changing back to NKG BPR5ES might be the solution.

Next wekend I'll do all those things and test the shit out of it.

I'll keep you posted.

 

Michael Savard (1981 308 GTSi)

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